Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7e4822f493b64d…

MALICIOUS

PDF

36.3 KB Created: 2021-05-21 07:53:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0dc3f5ebb95d100ea214cb4d0c62a29f SHA-1: 07ed356d1cbf640c1a6a8f117e922919f204d060 SHA-256: fe7e4822f493b64de4c2f10e41133722c6638c24704400704fe0181af1e8b96f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, encouraging users to click a link to access a 'free Robux' generator. This link, 'https://netcdn.xyz/app/431946152/free-robux-giveaway-game-hack', likely leads to a malicious website designed to exploit the user or deliver further malware. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-robux-giveaway-game-hack
    • http://eurocomes.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • http://eurocomes.com/images/roblox-earn_GM431946152.pdf
    • http://eurocomes.com/images/coin-master-hack-without-downloading-apps_GM406889139.pdf
    • http://eurocomes.com/images/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://eurocomes.com/images/roblox-piano-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003015.bin
ee1790a0c8e300fc6041212985d8be73e3f4318f3861771d5c3c61c12207b18d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3015 25804 bytes
font_01_sfnt_off00006ae7.bin
a907981f6338d23acda294c558170907db38f399f16fdb2ca0bc536a0b707f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE7 18820 bytes

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